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keychange

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About keychange

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    http://www.andrewhunter.com.au
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    Australia
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  1. Cota 247 Motoplat Ignition Set-Up... Clueless!

    Went to take my 247 for a run today and for the first time in years she wouldn't start. No spark so started working backwards from the cut of switch ...finally removed the low voltage coils and it appears that I have a short circuit to earth. So it looks like a burnt out coil - strange that it got me home without an issue last ride. Does anyone know the correct resistance for the coil?
  2. Cota 247 Motoplat Ignition Set-Up... Clueless!

    ThreeBond is your friend ....let it cure at least 24 hours and it lasts years
  3. Cota 247 Gear Selection

    When I say "original" I mean copy of original - I have a good quality scanned version for 247C and 247T but each page is seperate message me your email and I will send
  4. Cota 247 Gear Selection

    Underslung clutch went out on Model 21M19228 on LHS an 21M6700 on RHS ..but according to my original 247 Manual there was never a modification from 4 speed to 5 speed. Your model is 21M .???? - there were 6 variants in gear box from model 21M 0600 - 3750 - 5288 - 6600 -7256 and 21385
  5. Honda tlr 125

    This has got to be close - but your post begs the question, why buy a TLR125 trials bike if you want to do more than 40mph https://thumpertalk.com/uploads/monthly_10_2015/post-378290-0-38088700-1446208661.jpg
  6. Montesa Cota 247 Break In Period

    There are three tank/seat options ( maybe more ). I have the standard trials body as per your photo - the 247T (trail) body with larger tank and longer padded seat and the later model large tank with very comfy seat. The latter requires rubber grommet spacers for he rear mounts but otherwise fits perfectly and is very comfortable.
  7. cota 247 hot and cold

    I had similar experience with my 247 years ago - in mine the idle speed also increased - appeared to be running lean but after many many hours and $$$ on the carbie I realised the timing was slightly too advanced and that was the issue. After no luck with depth guage I used paper timing disk - see attached and had no problems ever since. timing.disc.pdf
  8. Montesa Cota 247 kickstart spring

    The spring has to have some loading on it otherwise it will flop around. The kick start is usually installed at around 2 o'clock rather than vertical. I have only had one spring break and that was when my son tried starting with the clutch in
  9. Montesa Cota 247 Break In Period

    Normally you can't apply a new sealer over an old sealer and it can be a big job removing the old stuff. Wait until you can see what is there as long as the original sealing job was done correctly it should be fine.
  10. Montesa Cota 247 Break In Period

    Take it easy in terms of long downhill runs for a few hours...but apart from that standard trials type riding is pretty ideal for engine break in ...but avoid labouring the engine ie: pulling away in a gear that is too high. I would also suggest that you get an after-market compression release - as the starter gear is very vulnerable and difficult to obtain. I run 25:1 and castrol VMX80 in the gear box. Some guys recommend ATF but my 76 model jumps out of gear in every gear and false neutrals everywhere. With VMX it only jumps out for first, occasionally 2nd but no false neutrals. I am guessing that yours is around a 75 model - engine number should tell you.
  11. TDC indicator tool,point setting?

    I have a 247 and could never get a good outcome with 2.5 mm measure (for the 247) - once I switched to using a paper timing disc it was perfect and hasn't been touched in last 5 years.
  12. 247 bash plate

    This small one was on mine when I got it - it protects the case covers but leaves the frame exposed as it is fitted above the frame. I have broken the frame on rocks so I got a guy to cut out a sheet of aluminium plate and I bent it into shape. Problem engine sat lower without original and when I measured it up for new one I forgot to allow for the cases and so I ended up with both. Sorry I don't have a recent shot with both.
  13. Cota 247 Motoplat Ignition Set-Up... Clueless!

    https://www.speedandsport.com/index.php/parts/ignition-lighting/ignition-coil/ $18USD - I have one and it works perfectly. It took me 6 months to get my Cota working reliably, very frustrating but that was 10 years ago and it has been fantastic ever since. I haven't touched the points since then either. PS - make sure coil is bare metal to metal earth
  14. Cota 247 Motoplat Ignition Set-Up... Clueless!

    I cut all wires from auxilary stators just in case they were shorting. The engine seals would have to be totally stuffed for it not to fire at all.....again compression and leak test would confirm. Likewise timing would have to be out to buggery like 180 degrees. So almost certainly you have electrical issue causing very weak spark. There is only a few parts involved, remind me did you replace the coil - pick up a cheapie on ebay.
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